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PCB Mounted Active Buzzer Module (KY-012)

SKU: LC7505D7BC
The KY-012 Active Buzzer Module is a compact audio output module designed to generate an audible alert with a simple digital control signal. Unlike a passive buzzer, the KY-012 features a built-in oscillator, allowing it to produce a continuous tone whenever power or a HIGH logic signal is applied. No external PWM or frequency generation is required, making it extremely...
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Orders placed before 3 PM IST will be shipped on the same day (excluding Sundays and Public holidays) through our shipping partners. In rare cases, the pickup may get delayed during Public holidays / Bandh / Environmental disturbances.

Specifications

Specifications:

Module Type: Active Piezo Buzzer Module
Model: KY-012
Buzzer Type: Active Piezoelectric Buzzer
Operating Voltage: 3.3V to 5V DC
Recommended Operating Voltage: 5V DC
Maximum Operating Current: 30mA
Tone Frequency: 2.5kHz ± 300Hz
Minimum Sound Output: 85dB (at 10cm)
Built-in Oscillator: Yes
Control Method: Digital HIGH/LOW Signal
Output Type: Fixed Tone Audio Output
Response Time: Instantaneous
Interface Pins: S, VCC, GND
Operating Temperature: -20°C to +70°C
Storage Temperature: -30°C to +105°C
Module Dimensions: Approximately 19mm × 15.5mm × 11mm
Weight: Approximately 1g
Mounting Type: PCB Through-Hole Module
Compatibility: Arduino, ESP32, STM32, Raspberry Pi Pico, AVR, PIC

Additional Resources

Active Buzzer.PDF

FAQ

1. What is the KY-012 Active Buzzer Module used for?

The KY-012 is used to generate audible alerts in alarm systems, timers, notification devices, robotics, automation projects, and embedded electronic applications.

2. What is the difference between an active buzzer and a passive buzzer?

An active buzzer contains a built-in oscillator and produces sound when power is applied, while a passive buzzer requires an external PWM or square wave signal to generate sound.

3. Can the KY-012 be connected directly to Arduino and ESP32 boards?

Yes, the KY-012 operates from 3.3V to 5V and can be connected directly to a digital output pin of Arduino, ESP32, STM32, Raspberry Pi Pico, and other compatible microcontrollers.

4. Does the KY-012 require PWM to generate sound?

No. Since the module includes a built-in oscillator, it only requires a HIGH digital signal or power supply to produce its fixed-tone sound.

5. What is the sound frequency of the KY-012 Active Buzzer Module?

The module produces a fixed audio tone with a frequency of approximately 2.5kHz (±300Hz), making it suitable for alarms and notification applications.

View full product details

The KY-012 Active Buzzer Module is a compact audio output module designed to generate an audible alert with a simple digital control signal. Unlike a passive buzzer, the KY-012 features a built-in oscillator, allowing it to produce a continuous tone whenever power or a HIGH logic signal is applied. No external PWM or frequency generation is required, making it extremely easy to use with microcontrollers.

The module operates from 3.3V to 5V, making it compatible with Arduino, ESP32, STM32, Raspberry Pi Pico, and other embedded development boards. Its compact PCB design, low power consumption, and loud sound output make it ideal for alarms, warning systems, timers, notification devices, robotics, and educational electronics projects.

Key Features

  • Active piezoelectric buzzer with built-in oscillator
  • Produces sound with a simple HIGH digital signal
  • No PWM or external frequency generation required
  • Loud and clear audio output
  • Low power consumption
  • Fast response time
  • Compact PCB-mounted module
  • Simple 3-pin interface
  • Reliable and stable operation
  • Long operating life
  • Suitable for alarms and notification systems
  • Compatible with Arduino, ESP32, STM32, and Raspberry Pi
  • Ideal for robotics, automation, and embedded applications
  • Perfect for educational and DIY electronics projects